Locomotive smoke box construction



July 7, 1931.

.J. R. WHEARY ET AL 1,812,912

LOCOMOTIVE SMOKE BOX CONSTRUCTION Filed Feb. 7, 1930 3 Streets-Sheet llnveniorJ U 7 (I23 W641 Q J, ZUCdJ By flaw, 1..

Attorney July 7, 1931. J. R. W HEARY ET AL 1,812,912

LOCOMOTIVE SMOKE BOX CONSTRUCTION Filed Feb. 7, 1930 5 Sheets-Sheet 2Inventor.)

17,1 2 Meal y Q Zia/0616 By @Mm A ttorney July 7, 1931. Y R. WHEARY ETAL 1,812,912

LQCOMOTIVE SMOKE BOX vC DNS'IRUGTION Filed Feb. 7, 1 950 3Sheets-Sheet'3 Inventor;

Wfiear f, flaccid j gwm A tiom e u v as to facilitate the Patented July7, 1931 aa q eaxssepse ae se s s sem-r Application filed Fehruary 7, 1930.

--Ihisinv ention relates to an-improved locomotive 'sinolze boxstructure characterized by 'advantageous'" refinements and .featuresnotio'und in fprior used and patented constructions with which we arefamiliar. JAY characteristicdistinction embodied in the ni'ewarrangemntis the prbvision of a' practical andfeasible spark arr-esterwhich is especially made and arrangedto minimize tliescape ofdan'geroussparks into the atinosph'ere, and to. therebyv relieve fire. hazardswithin thevicin'ity of railroad tracks.

further-feature of the-iiivention is predica'ted iuppn the{incorporation in the structu're'ofan efficjient1f0ramii1ous cage somade production of an'eflicient draft and at the sameitime. to preventthe sage hereinto of dangerouspartic-les of combustioii spark.

Otlierifeatures and advantages will become more readily apparent fromthe following description and drawings.

In the drawings:

Figure 1 is a view in section and elevation showi g the preferredembodiment of the invention.

Figure 2 is a section on the line 2-2 of Figure 1.

Figure 3 is a section and elevational view showing the anchorage for thelower end portion of the cage.

Figure 4 is a detail view of the front plate of the cage.

Figure 5 is a top plan view of the cage.

Figure 6 is a perspective View of the anchoring frame.

Figure 7 is a View similar to Figure 1 showing a slightly modifiedembodiment of the invention.

Figure 8 is an enlarged detail section on the line 88 of Figure 1.

In Figure 1, the reference character 9 designates the discharge endportion of the conventional boiler and 10 represents the boiler tubes.In accordance with the present invention there isa depending bafileplate 11' carried by the head plate 12 and this baflie plate has anextension at its bottom which assumes a proper elevation with respect tothe lowermost tubes.

si -F P- .6.

The numeral 14 designates generallythc smoke-box, 15 represents .theSmokestack, and 16 a slupplementalpart of thelstack whichisreferrdtovariously asafpetticoat or skirt. This extends into. theinterior foflthe firebox where it is bolted or otherwise attached totlie cage 17. lncidentally,.the cage is of. general polygonalcrosssection andiscompo scd of four-distinguishable fiat walls. orinstaiice,- thejfront. wall 17. (see=F igue 4) is ;in the'natiire of asolid pla'teof. the configuration shown. 'lhetopllQ is alsoin thenaturelofa s'olid plate and of .generalrectangil'lar con figuration andformed Qwith .a ihole .20 with whichtheslgirt l6conimunicates.

ilnaddit'ion, 1711611611811 rear screen WallQl and spaced parallelsideowallsl22 al'l of; which areinclined inwardly and ,dolwnwardlyl andfastened toananchoringframe 23 qfthetypl shown .'in.'Figi1re 6.' ,Thisframe islrigidly fastene dcto jthe 1 bottom. or. the smoke box .as,shown-infiigultel. rThe .franielsurrounds .the inwardly .protrudingendof thelexhaust nozzlej24- ilh nozzle as seen, projects upwardly intothe. interior of .thepcage 17.- qflhe terminal ,end thereof .is above.the lower end 1 o the 1 battle extension '13. incidentally, th v retular, a11s 21 Land .22 arev of approp ia mesh screenyandithese aremaderigidhymargina fasteni g strip .01 bar 25 secured togethe in .afigularlrelationship as. seen in Figl lf $.8-'Iihsfcreensarieboltedtothebflrs.thrQHghIhG medium of bolts 26. j u

fllirekzting. attention .to Figur 7, t .wi lib seen that themodifiedsformfif theinv n on isfquite similar tdtliat. alreadydescribedwith the .exceptionthattheskin :16 .i Qmi fidimd the cagedfz.isextendefcl.en ilslyitp the top, t the smokeeboxiand.suitably fa tilfldlhfiliem- The primary object offihis inYBHfiiQI 1. .1 0 prevent.the engine from throwing -fire by completely enshroudingithe exhaus Stad from .any ,ope'ning other .thanlthe lnes cs'z n the cage netting,whereby the exhaus -from the,l0c0mbtiue;' by suction could force sparksto the atmosphere in a burning condition. This .invfitihhieliminates.the' usual italile sheets :inth smokeIbox .and naarranges' the positionotthe, diaphragm from .the front 051? the bottom of the petticoatpipe,where a large tiff smoke-box,

' prevention the exhaust stand to the rear of it by attaching it to thebaffle plates.

By eliminating the table sheets from the a better vacuum is created,which results in a better steaming boiler, savesothe consumption of fuelandmakes an absolute for the-engine to throw fire.

We submit that locomotives equipped with this netting lessens the firehazards thatrailroads are confronted with by setting out of fires alongthe right-of-wfiay. "We also claim it'lessens the maintenance cost byeliminating the table sheets and brings into full view of the nettinginspectors all of the appurtenances of this netting which enables themto make a closeand thorough inspection without drawing the fire, whichis very expensive. We also claim that the cost of sparking thefront endis eliminated as there is no accumulation of sparks due to the perfectsparking conditions of our netting. 1' r Y i In the application ofthescreen netting, it is very important to get it applied in such a waythat the sparks will not hang in the meshes. Sparks striking against thenetting must notstrike the netting with a radius, but must strikesquarely against the square surfaces. This causes the sparks togravitate and revent clogging of the pores of the screen.

It will be observed that the cage is made in four distinguishablesections, and each side is fastened to the bottom of the smoke-box andit does not interfere with the exhaust nozzle in any way whatever. Inthe primary form of the-invention, the walls of the cage extend in asubstantially vertical position to plate is bolted to the bottom of thepetticoat pipe, said'plate constituting thetop of the cage. U I

There are no obstructions whatever to re tard the passing of the exhaustfrom-the pipe to the Smokestack and this method with'any kind of nettingdesired makes an absolutely i fireproof'structure for the front end and'prevents the passage of sparks fromthe smokestack into the atmosphereto the extent of rendering the complete structure highlysatisfactory andeflicient. i 7 V It isto be remembered that most railroads requireinspectlon of netting to see that it is v maintained free from defectsto prevent the engines from throwing'fire'. There must be somearrangement made for the application of the netting to the front endwhereby this inspection can be made. In the present arrangement, thereis no obstruction whatever to the inspection of the netting. It can beeasily inspected on the sides, front, back and top and it can beinspected without drawing the fire from the firebox or cooling theengine down. 7 1 I It is thought that persons skilled inthe'art to whichthe invention relates will be able to obtain a clear understanding ofthe invention;

after considering the description in connection with the drawings.Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size, and rearrangement of details coming withinthe field of invention claimed may beresorted to in actual practice ifdesired.

y We claim: I

In a spark arrester for locomotives, in combination, a boilerincluding-an end head, flue tubes connected w1th said head and arrangedin said boiler, 'asmoke box extending outwardly from and surroundingsaid head, an exhaust nozzle projecting upwardly into said smoke box, aismokestack extending upwardly and outwardly from the smoke box and invertical'alinement, with said nozzle, a multiple wall cage arranged insaid smokebo-x in spaced relation to the end head and having 7 its lowerend portion embracing theprojecttures. V

JOSEPH R. WHEARY. GEORGE J .LUCAS.

